Disabled GCC 8.1.0 warnings -Wclass-memaccess (#1822)

diff --git a/imgui.cpp b/imgui.cpp
index b4b5b18..3e53f1f 100644
--- a/imgui.cpp
+++ b/imgui.cpp

@@ -705,6 +705,7 @@
 #pragma GCC diagnostic ignored "-Wconversion"               // warning: conversion to 'xxxx' from 'xxxx' may alter its value
 #pragma GCC diagnostic ignored "-Wformat-nonliteral"        // warning: format not a string literal, format string not checked
 #pragma GCC diagnostic ignored "-Wstrict-overflow"          // warning: assuming signed overflow does not occur when assuming that (X - c) > X is always false
+#pragma GCC diagnostic ignored "-Wclass-memaccess"          // warning: memset/memcpy clearing/writing an object of type xxxx with no trivial copy-assignment; use assignment or value-initialization instead
 #endif
 
 // Enforce cdecl calling convention for functions called by the standard library, in case compilation settings changed the default to e.g. __vectorcall

diff --git a/imgui_draw.cpp b/imgui_draw.cpp
index 7694ce4..52908d8 100644
--- a/imgui_draw.cpp
+++ b/imgui_draw.cpp

@@ -54,6 +54,7 @@
 #pragma GCC diagnostic ignored "-Wunused-function"          // warning: 'xxxx' defined but not used
 #pragma GCC diagnostic ignored "-Wdouble-promotion"         // warning: implicit conversion from 'float' to 'double' when passing argument to function
 #pragma GCC diagnostic ignored "-Wconversion"               // warning: conversion to 'xxxx' from 'xxxx' may alter its value
+#pragma GCC diagnostic ignored "-Wclass-memaccess"          // warning: memset/memcpy clearing/writing an object of type xxxx with no trivial copy-assignment; use assignment or value-initialization instead
 #endif
 
 //-------------------------------------------------------------------------