Fixed warnings for more pedantic settings (#258)

examples/opengl3_example/imgui_impl_glfw_gl3.cpp

@@ -69,7 +69,7 @@ static void ImGui_ImplGlfwGL3_RenderDrawLists(ImDrawList** const cmd_lists, int
     if (g_VboSize < needed_vtx_size)
     {
         g_VboSize = needed_vtx_size + 5000 * sizeof(ImDrawVert);  // Grow buffer
-        glBufferData(GL_ARRAY_BUFFER, g_VboSize, NULL, GL_STREAM_DRAW);
+        glBufferData(GL_ARRAY_BUFFER, (GLsizeiptr)g_VboSize, NULL, GL_STREAM_DRAW);
     }
 
     // Copy and convert all vertices into a single contiguous buffer

examples/opengl_example/imgui_impl_glfw.cpp

@@ -76,7 +76,7 @@ static void ImGui_ImplGlfw_RenderDrawLists(ImDrawList** const cmd_lists, int cmd
             {
                 glBindTexture(GL_TEXTURE_2D, (GLuint)(intptr_t)pcmd->texture_id);
                 glScissor((int)pcmd->clip_rect.x, (int)(height - pcmd->clip_rect.w), (int)(pcmd->clip_rect.z - pcmd->clip_rect.x), (int)(pcmd->clip_rect.w - pcmd->clip_rect.y));
-                glDrawArrays(GL_TRIANGLES, vtx_offset, pcmd->vtx_count);
+                glDrawArrays(GL_TRIANGLES, vtx_offset, (GLsizei)pcmd->vtx_count);
             }
             vtx_offset += pcmd->vtx_count;
         }

imgui.cpp

@@ -719,10 +719,8 @@ void ImGuiIO::AddInputCharacter(ImWchar c)
 const float IM_PI = 3.14159265358979323846f;
 
 #ifdef INT_MAX
-#define IM_INT_MIN  INT_MIN
 #define IM_INT_MAX  INT_MAX
 #else
-#define IM_INT_MIN  (-2147483647-1)
 #define IM_INT_MAX  (2147483647)
 #endif
 
@@ -742,7 +740,7 @@ static inline ImVec2 operator-(const ImVec2& lhs, const ImVec2& rhs)
 static inline ImVec2 operator*(const ImVec2& lhs, const ImVec2 rhs)             { return ImVec2(lhs.x*rhs.x, lhs.y*rhs.y); }
 static inline ImVec2 operator/(const ImVec2& lhs, const ImVec2 rhs)             { return ImVec2(lhs.x/rhs.x, lhs.y/rhs.y); }
 static inline ImVec2& operator+=(ImVec2& lhs, const ImVec2& rhs)                { lhs.x += rhs.x; lhs.y += rhs.y; return lhs; }
-static inline ImVec2& operator-=(ImVec2& lhs, const ImVec2& rhs)                { lhs.x -= rhs.x; lhs.y -= rhs.y; return lhs; }
+//static inline ImVec2& operator-=(ImVec2& lhs, const ImVec2& rhs)              { lhs.x -= rhs.x; lhs.y -= rhs.y; return lhs; }
 static inline ImVec2& operator*=(ImVec2& lhs, const float rhs)                  { lhs.x *= rhs; lhs.y *= rhs; return lhs; }
 //static inline ImVec2& operator/=(ImVec2& lhs, const float rhs)                { lhs.x /= rhs; lhs.y /= rhs; return lhs; }
 static inline ImVec4 operator-(const ImVec4& lhs, const ImVec4& rhs)            { return ImVec4(lhs.x-rhs.x, lhs.y-rhs.y, lhs.z-rhs.z, lhs.w-lhs.w); }
@@ -11530,7 +11528,7 @@ void ImGui::ShowTestWindow(bool* opened)
                 if (i > 0) ImGui::SameLine();
                 ImGui::BeginGroup();
                 ImGui::Text("%s", i == 0 ? "Top" : i == 1 ? "25%" : i == 2 ? "Center" : i == 3 ? "75%" : "Bottom");
-                ImGui::BeginChild(ImGui::GetID((void *)i), ImVec2(ImGui::GetWindowWidth() * 0.17f, 200.0f), true);
+                ImGui::BeginChild(ImGui::GetID((void *)(intptr_t)i), ImVec2(ImGui::GetWindowWidth() * 0.17f, 200.0f), true);
                 if (scroll_to)
                     ImGui::SetScrollFromPosY(ImGui::GetCursorStartPos().y + scroll_to_px, i * 0.25f);
                 for (int line = 0; line < 100; line++)