Fix Clang 9.0 zealous warnings

imgui_demo.cpp

@@ -629,7 +629,7 @@ static void ShowDemoWindowWidgets()
                 {
                     ImGui::Text("blah blah");
                     ImGui::SameLine();
-                    if (ImGui::SmallButton("button")) {};
+                    if (ImGui::SmallButton("button")) {}
                     ImGui::TreePop();
                 }
             }

imgui_draw.cpp

@@ -617,8 +617,8 @@ void ImDrawList::PrimQuadUV(const ImVec2& a, const ImVec2& b, const ImVec2& c, c
 
 // On AddPolyline() and AddConvexPolyFilled() we intentionally avoid using ImVec2 and superflous function calls to optimize debug/non-inlined builds.
 // Those macros expects l-values.
-#define IM_NORMALIZE2F_OVER_ZERO(VX,VY)     { float d2 = VX*VX + VY*VY; if (d2 > 0.0f) { float inv_len = 1.0f / ImSqrt(d2); VX *= inv_len; VY *= inv_len; } }
-#define IM_FIXNORMAL2F(VX,VY)               { float d2 = VX*VX + VY*VY; if (d2 < 0.5f) d2 = 0.5f; float inv_lensq = 1.0f / d2; VX *= inv_lensq; VY *= inv_lensq; }
+#define IM_NORMALIZE2F_OVER_ZERO(VX,VY)     do { float d2 = VX*VX + VY*VY; if (d2 > 0.0f) { float inv_len = 1.0f / ImSqrt(d2); VX *= inv_len; VY *= inv_len; } } while (0)
+#define IM_FIXNORMAL2F(VX,VY)               do { float d2 = VX*VX + VY*VY; if (d2 < 0.5f) d2 = 0.5f; float inv_lensq = 1.0f / d2; VX *= inv_lensq; VY *= inv_lensq; } while (0)
 
 // TODO: Thickness anti-aliased lines cap are missing their AA fringe.
 // We avoid using the ImVec2 math operators here to reduce cost to a minimum for debug/non-inlined builds.
@@ -680,7 +680,7 @@ void ImDrawList::AddPolyline(const ImVec2* points, const int points_count, ImU32
                 // Average normals
                 float dm_x = (temp_normals[i1].x + temp_normals[i2].x) * 0.5f;
                 float dm_y = (temp_normals[i1].y + temp_normals[i2].y) * 0.5f;
-                IM_FIXNORMAL2F(dm_x, dm_y)
+                IM_FIXNORMAL2F(dm_x, dm_y);
                 dm_x *= AA_SIZE;
                 dm_y *= AA_SIZE;
 

imstb_truetype.h

@@ -2538,11 +2538,11 @@ static stbtt_int32  stbtt__GetGlyphGPOSInfoAdvance(const stbtt_fontinfo *info, i
                             // There are no other cases.
                             STBTT_assert(0);
                             break;
-                        };
+                        } // [DEAR IMGUI] removed ;
                     }
                 }
                 break;
-            };
+            } // [DEAR IMGUI] removed ;
 
             default:
                 // TODO: Implement other stuff.